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A marathon runner completes a race in 2 hours and 30 minutes. What is his averag

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Question: A marathon runner completes a race in 2 hours and 30 minutes. What is his average speed in km/h if the marathon distance is 42 km? (2022)

Options:

  1. 16.8
  2. 17.0
  3. 17.5
  4. 18.0

Correct Answer: 17.0

Exam Year: 2022

Solution: 

Total time in hours = 2 + 30/60 = 2.5 hours. Average speed = distance/time = 42 km / 2.5 h = 16.8 km/h.

A marathon runner completes a race in 2 hours and 30 minutes. What is his averag

Practice Questions

Q1
A marathon runner completes a race in 2 hours and 30 minutes. What is his average speed in km/h if the marathon distance is 42 km? (2022)
  1. 16.8
  2. 17.0
  3. 17.5
  4. 18.0

Questions & Step-by-Step Solutions

A marathon runner completes a race in 2 hours and 30 minutes. What is his average speed in km/h if the marathon distance is 42 km? (2022)
  • Step 1: Convert the time from hours and minutes to just hours. The runner completed the race in 2 hours and 30 minutes.
  • Step 2: To convert 30 minutes to hours, divide 30 by 60. This gives you 0.5 hours.
  • Step 3: Add the 2 hours to the 0.5 hours. So, 2 + 0.5 = 2.5 hours.
  • Step 4: Now, use the formula for average speed, which is distance divided by time. The distance of the marathon is 42 km.
  • Step 5: Divide the distance (42 km) by the time (2.5 hours). So, 42 km / 2.5 h = 16.8 km/h.
  • Step 6: The average speed of the marathon runner is 16.8 km/h.
  • Average Speed Calculation – The average speed is calculated by dividing the total distance traveled by the total time taken.
  • Time Conversion – Understanding how to convert minutes into hours is essential for accurate calculations.
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